Process analysis device, process analysis method, and process analysis recording medium

A process analysis method,

• wherein a computer executes:
• a step of acquiring a plurality of first state data relating to the normal state of a plurality of mechanisms constituting a production line;
• a step of acquiring a plurality of second state data relating to the state of the plurality of mechanisms when an abnormality occurs;
• a step of identifying a connection state between the plurality of mechanisms as a first connection state by analyzing the acquired plurality of first state data;
• a step of identifying a connection state between the plurality of mechanisms as a second connection state by analyzing the acquired plurality of second state data;
• a step of identifying a causal relationship between the plurality of mechanisms in a process carried out on the production line as a normal period causal relationship based on the first connection state;
• a step of identifying a causal relationship between the plurality of mechanisms in a process carried out on the production line as an abnormal period causal relationship based on the second connection state;
• and
• a step of comparing the normal period causal relationship with the abnormal period causal relationship and identifying the causal relationship between the plurality of the mechanisms involved in the occurrence of an abnormality as a special causal relationship.

A process analysis computer-readable recording medium, causing a computer to execute:

• a step of acquiring a plurality of first state data relating to the normal state of a plurality of mechanisms constituting a production line;
• a step of acquiring a plurality of second state data relating to the state of the plurality of mechanisms when an abnormality occurs;
• a step of identifying a connection state between the plurality of mechanisms as a first connection state by analyzing the acquired plurality of first state data;
• a step of identifying a connection state between the plurality of mechanisms as a second connection state by analyzing the acquired plurality of second state data;
• a step of identifying a causal relationship between the plurality of mechanisms in a process carried out on the production line as a normal period causal relationship based on the first connection state;
• a step of identifying a causal relationship between the plurality of mechanisms in a process carried out on the production line as an abnormal period causal relationship based on the second connection state;
• and
• a step of comparing the normal period causal relationship with the abnormal period causal relationship and identifying the causal relationship between the plurality of the mechanisms involved in the occurrence of an abnormality as a special causal relationship.